64545451 has 16 divisors (see below), whose sum is σ = 70048000. Its totient is φ = 59276448.

The previous prime is 64545443. The next prime is 64545473. The reversal of 64545451 is 15454546.

It is a cyclic number.

It is not a de Polignac number, because 64545451 - 2³ = 64545443 is a prime.

It is a super-2 number, since 2×64545451² = 8332230489586802, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64545491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 162385 + ... + 162781.

It is an arithmetic number, because the mean of its divisors is an integer number (4378000).

Almost surely, 2^64545451 is an apocalyptic number.

64545451 is a deficient number, since it is larger than the sum of its proper divisors (5502549).

64545451 is a wasteful number, since it uses less digits than its factorization.

64545451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658.

The product of its digits is 48000, while the sum is 34.

The square root of 64545451 is about 8034.0183594513. The cubic root of 64545451 is about 401.1331431851.

Adding to 64545451 its reverse (15454546), we get a palindrome (79999997).

It can be divided in two parts, 6454545 and 1, that added together give a palindrome (6454546).

The spelling of 64545451 in words is "sixty-four million, five hundred forty-five thousand, four hundred fifty-one".